test: default mock time to genesis block

Author: Sjors

src/test/sv2_test_setup.cpp

@@ -18,6 +18,9 @@ Sv2BasicTestingSetup::Sv2BasicTestingSetup()
     // Select a default chain for tests to satisfy BaseParams() users.
     SelectBaseParams(ChainType::REGTEST);
 
+    // Default mock time anchored to Bitcoin genesis so certificate helpers see a realistic clock.
+    SetMockTime(TEST_GENESIS_TIME);
+
     // Create an isolated temporary datadir for this test process.
     const auto micros = count_microseconds(Now<SteadyMicroseconds>().time_since_epoch());
     const std::string subdir = util::Join(std::array<std::string, 2>{"sv2_tests", util::ToString(micros)}, "");
@@ -37,6 +40,8 @@ Sv2BasicTestingSetup::Sv2BasicTestingSetup()
 
 Sv2BasicTestingSetup::~Sv2BasicTestingSetup()
 {
+    SetMockTime(std::chrono::seconds{0});
+
     try {
         fs::remove_all(m_tmp_root);
     } catch (const std::exception&) {

src/test/sv2_test_setup.h

@@ -47,6 +47,9 @@ inline Sv2SignatureNoiseMessage MakeSkewTolerantCertificate(const CKey& static_k
                                     XOnlyPubKey(static_key.GetPubKey()), authority_key);
 }
 
+//! Default mock time for SV2 unit tests: Bitcoin genesis block timestamp (2009-01-03).
+inline constexpr std::chrono::seconds TEST_GENESIS_TIME{1231006505};
+
 
 class ECC_Context;